From 8b34b4ec4011be52f10fc55b1bc915368060a5ab Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E9=99=88=E5=AD=90=E9=BB=98?= <925456043@qq.com> Date: Sat, 18 Apr 2026 21:02:59 +0800 Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D=E5=BE=AA=E7=8E=AF?= =?UTF-8?q?=E8=8A=82=E7=82=B9=E6=A8=A1=E6=9D=BF=E4=B8=8A=E4=B8=8B=E6=96=87?= =?UTF-8?q?=E4=B8=8E=E7=B4=AF=E8=AE=A1=E8=BE=93=E5=87=BA?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - 统一节点模板渲染上下文，补齐 memory、当前参数与环境变量 - 支持循环体读取父循环上一轮输出，并区分空字符串与缺失值 - 补充模板路径、上下文与循环累计场景回归测试 --- .../flow/core/chain/ChainState.java | 34 +++- .../easyagents/flow/core/node/CodeNode.java | 4 +- .../easyagents/flow/core/node/HttpNode.java | 9 +- .../flow/core/node/KnowledgeNode.java | 6 +- .../easyagents/flow/core/node/LlmNode.java | 6 +- .../easyagents/flow/core/node/LoopNode.java | 48 +++++- .../flow/core/node/SearchEngineNode.java | 6 +- .../flow/core/util/TextTemplate.java | 37 ++++- .../core/test/ChainTemplateContextTest.java | 35 +++++ .../test/LoopNodeProgressContextTest.java | 145 ++++++++++++++++++ .../flow/core/test/TextTemplatePathTest.java | 23 +++ 11 files changed, 332 insertions(+), 21 deletions(-) create mode 100644 easy-agents-flow/src/test/java/com/easyagents/flow/core/test/ChainTemplateContextTest.java create mode 100644 easy-agents-flow/src/test/java/com/easyagents/flow/core/test/LoopNodeProgressContextTest.java diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/chain/ChainState.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/chain/ChainState.java index 9c1f0dc..21c0786 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/chain/ChainState.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/chain/ChainState.java @@ -370,6 +370,38 @@ public class ChainState implements Serializable { return formatArgsMap; } + /** + * 构建文本模板渲染所需的上下文列表。 + *

+ * 顺序为：链路 memory -> 当前节点参数/临时参数 -> 环境变量。 + * 后面的 map 会覆盖前面的同名 key，这样既能兼容直接引用历史节点输出， + * 又能保证当前节点显式解析出的参数优先级更高。 + * + * @param formatArgs 当前节点参与模板渲染的参数 + * @return 模板渲染上下文列表 + */ + public List> buildTemplateRootMaps(Map formatArgs) { + return Arrays.asList(getMemory(), formatArgs, getEnvMap()); + } + + /** + * 构建文本模板渲染所需的合并上下文。 + * + * @param formatArgs 当前节点参与模板渲染的参数 + * @return 合并后的模板上下文 + */ + public Map buildTemplateContextMap(Map formatArgs) { + Map templateContext = new LinkedHashMap<>(); + if (memory != null && !memory.isEmpty()) { + templateContext.putAll(memory); + } + if (formatArgs != null && !formatArgs.isEmpty()) { + templateContext.putAll(formatArgs); + } + templateContext.putAll(getEnvMap()); + return templateContext; + } + public Map resolveParameters(Node node, List parameters, Map formatArgs, boolean ignoreRequired) { if (parameters == null || parameters.isEmpty()) { return Collections.emptyMap(); @@ -381,7 +413,7 @@ public class ChainState implements Serializable { Object value = null; if (refType == RefType.FIXED) { value = TextTemplate.of(parameter.getValue()) - .formatToString(Arrays.asList(formatArgs, getEnvMap())); + .formatToString(buildTemplateRootMaps(formatArgs)); } else if (refType == RefType.REF) { value = this.resolveValue(parameter.getRef()); } diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/CodeNode.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/CodeNode.java index 54f8123..65f5201 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/CodeNode.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/CodeNode.java @@ -53,8 +53,8 @@ public class CodeNode extends BaseNode { } ChainState chainState = chain.getState(); - List> variables = Arrays.asList(chainState.resolveParameters(this), chainState.getEnvMap()); - String newCode = TextTemplate.of(code).formatToString(variables); + Map parameterValues = chainState.resolveParameters(this); + String newCode = TextTemplate.of(code).formatToString(chainState.buildTemplateRootMaps(parameterValues)); CodeRuntimeEngine codeRuntimeEngine = CodeRuntimeEngineManager.getInstance().getCodeRuntimeEngine(this.engine); if (codeRuntimeEngine == null) { diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/HttpNode.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/HttpNode.java index a4f93ab..dfbc5d3 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/HttpNode.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/HttpNode.java @@ -213,7 +213,8 @@ public class HttpNode extends BaseNode { public Map doExecute(Chain chain) throws IOException { Map argsMap = chain.getState().resolveParameters(this); - String newUrl = TextTemplate.of(url).formatToString(Arrays.asList(argsMap, chain.getState().getEnvMap())); + String newUrl = TextTemplate.of(url) + .formatToString(chain.getState().buildTemplateRootMaps(argsMap)); Request.Builder reqBuilder = new Request.Builder().url(newUrl); @@ -280,7 +281,8 @@ public class HttpNode extends BaseNode { private RequestBody getRequestBody(Chain chain, Map formatArgs) { if ("json".equals(bodyType)) { - String bodyJsonString = TextTemplate.of(bodyJson).formatToString(formatArgs, true); + String bodyJsonString = TextTemplate.of(bodyJson) + .formatToString(chain.getState().buildTemplateContextMap(formatArgs), true); JSONObject jsonObject = JSON.parseObject(bodyJsonString); return RequestBody.create(jsonObject.toString(), MediaType.parse("application/json")); } @@ -317,7 +319,8 @@ public class HttpNode extends BaseNode { } if ("raw".equals(bodyType)) { - String rawBodyString = TextTemplate.of(rawBody).formatToString(Arrays.asList(formatArgs, chain.getState().getEnvMap())); + String rawBodyString = TextTemplate.of(rawBody) + .formatToString(chain.getState().buildTemplateRootMaps(formatArgs)); return RequestBody.create(rawBodyString, null); } //none diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/KnowledgeNode.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/KnowledgeNode.java index eb07bd8..a92bcfa 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/KnowledgeNode.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/KnowledgeNode.java @@ -72,8 +72,10 @@ public class KnowledgeNode extends BaseNode { @Override public Map execute(Chain chain) { Map argsMap = chain.getState().resolveParameters(this); - String realKeyword = TextTemplate.of(keyword).formatToString(Arrays.asList(argsMap, chain.getState().getEnvMap())); - String realLimitString = TextTemplate.of(limit).formatToString(Arrays.asList(argsMap, chain.getState().getEnvMap())); + String realKeyword = TextTemplate.of(keyword) + .formatToString(chain.getState().buildTemplateRootMaps(argsMap)); + String realLimitString = TextTemplate.of(limit) + .formatToString(chain.getState().buildTemplateRootMaps(argsMap)); int realLimit = 10; if (StringUtil.hasText(realLimitString)) { try { diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LlmNode.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LlmNode.java index 98ce2f3..177a713 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LlmNode.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LlmNode.java @@ -94,7 +94,8 @@ public class LlmNode extends BaseNode { throw new RuntimeException("Can not find user prompt"); } - String userPromptString = TextTemplate.of(userPrompt).formatToString(Arrays.asList(parameterValues, chain.getState().getEnvMap())); + String userPromptString = TextTemplate.of(userPrompt) + .formatToString(chain.getState().buildTemplateRootMaps(parameterValues)); Llm llm = LlmManager.getInstance().getChatModel(this.llmId); @@ -102,7 +103,8 @@ public class LlmNode extends BaseNode { throw new RuntimeException("Can not find llm: " + this.llmId); } - String systemPromptString = TextTemplate.of(this.systemPrompt).formatToString(Arrays.asList(parameterValues, chain.getState().getEnvMap())); + String systemPromptString = TextTemplate.of(this.systemPrompt) + .formatToString(chain.getState().buildTemplateRootMaps(parameterValues)); Llm.MessageInfo messageInfo = new Llm.MessageInfo(); messageInfo.setMessage(userPromptString); diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LoopNode.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LoopNode.java index 63c4fd7..f7c0ddc 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LoopNode.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/LoopNode.java @@ -71,6 +71,9 @@ public class LoopNode extends BaseNode { return Maps.of(ChainConsts.SCHEDULE_NEXT_NODE_DISABLED_KEY, true) .set(ChainConsts.NODE_STATE_STATUS_KEY, NodeStatus.RUNNING); } + + // 首次进入循环时，先为循环体暴露空的累计输出，方便子节点在第一轮读取到“空值”而不是缺参异常。 + publishLoopProgress(chain, Collections.emptyMap()); } // 由子节点返回：从堆栈低部获取当前循环上下文 else { @@ -105,7 +108,10 @@ public class LoopNode extends BaseNode { // 不是第一次执行，合并结果到 subResult if (loopContext.currentIndex != 0) { ChainState subState = chain.getState(); - mergeResult(loopContext.subResult, subState); + Map currentOutputs = collectCurrentOutputValues(subState); + mergeResult(loopContext.subResult, currentOutputs); + // 将上一轮最新输出同步到循环节点作用域，供下一轮循环体读取。 + publishLoopProgress(chain, currentOutputs); } @@ -198,7 +204,8 @@ public class LoopNode extends BaseNode { * @param toResult 主流程的输出参数 * @param subState 子流程的 */ - private void mergeResult(Map toResult, ChainState subState) { + private Map collectCurrentOutputValues(ChainState subState) { + Map currentOutputs = new LinkedHashMap<>(); List outputDefs = getOutputDefs(); if (outputDefs != null) { for (Parameter outputDef : outputDefs) { @@ -213,6 +220,19 @@ public class LoopNode extends BaseNode { value = outputDef.getValue(); } + currentOutputs.put(outputDef.getName(), value); + } + } + return currentOutputs; + } + + + private void mergeResult(Map toResult, Map currentOutputs) { + List outputDefs = getOutputDefs(); + if (outputDefs != null) { + for (Parameter outputDef : outputDefs) { + Object value = currentOutputs.get(outputDef.getName()); + @SuppressWarnings("unchecked") List existList = (List) toResult.get(outputDef.getName()); if (existList == null) { existList = new ArrayList<>(); @@ -224,6 +244,30 @@ public class LoopNode extends BaseNode { } + /** + * 将循环当前累计值同步到父循环节点作用域。 + *

+ * 循环体内读取 `loopNodeId.outputName` 时，拿到的是上一轮该输出的最新值； + * 循环结束后，handleNodeResult 会再把最终聚合结果（列表）覆盖回同名作用域。 + */ + private void publishLoopProgress(Chain chain, Map currentOutputs) { + List outputDefs = getOutputDefs(); + if (outputDefs == null || outputDefs.isEmpty()) { + return; + } + + chain.updateStateSafely(state -> { + ConcurrentHashMap memory = state.getMemory(); + for (Parameter outputDef : outputDefs) { + String key = this.id + "." + outputDef.getName(); + Object value = currentOutputs.get(outputDef.getName()); + memory.put(key, value == null ? "" : value); + } + return EnumSet.of(ChainStateField.MEMORY); + }); + } + + private String buildLoopStackId() { return this.getId() + "__loop__context"; } diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/SearchEngineNode.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/SearchEngineNode.java index 7d863da..a3ed2cf 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/SearchEngineNode.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/node/SearchEngineNode.java @@ -63,8 +63,10 @@ public class SearchEngineNode extends BaseNode { @Override public Map execute(Chain chain) { Map argsMap = chain.getState().resolveParameters(this); - String realKeyword = TextTemplate.of(keyword).formatToString(Arrays.asList(argsMap, chain.getState().getEnvMap())); - String realLimitString = TextTemplate.of(limit).formatToString(Arrays.asList(argsMap, chain.getState().getEnvMap())); + String realKeyword = TextTemplate.of(keyword) + .formatToString(chain.getState().buildTemplateRootMaps(argsMap)); + String realLimitString = TextTemplate.of(limit) + .formatToString(chain.getState().buildTemplateRootMaps(argsMap)); int realLimit = 10; if (StringUtil.hasText(realLimitString)) { try { diff --git a/easy-agents-flow/src/main/java/com/easyagents/flow/core/util/TextTemplate.java b/easy-agents-flow/src/main/java/com/easyagents/flow/core/util/TextTemplate.java index eebc8b1..909b84f 100644 --- a/easy-agents-flow/src/main/java/com/easyagents/flow/core/util/TextTemplate.java +++ b/easy-agents-flow/src/main/java/com/easyagents/flow/core/util/TextTemplate.java @@ -122,10 +122,11 @@ public class TextTemplate { } // 动态表达式求值 - String value = evaluate(token.parseResult, rootMap, escapeForJsonOutput); + EvaluationResult evaluationResult = evaluate(token.parseResult, rootMap, escapeForJsonOutput); + String value = evaluationResult.value; - // 没有兜底且值为空时抛出异常 - if (!token.explicitEmptyFallback && value.isEmpty()) { + // 没有兜底且表达式完全未命中时抛出异常 + if (!token.explicitEmptyFallback && !evaluationResult.resolved) { throw new IllegalArgumentException(String.format( "Missing value for expression: \"%s\"%nTemplate: %s%nProvided parameters:%n%s", token.rawExpression, @@ -202,19 +203,19 @@ public class TextTemplate { /** * 递归求值表达式（支持多级兜底） */ - private String evaluate(ParseResult pr, Map root, boolean escapeForJsonOutput) { - if (pr == null) return ""; + private EvaluationResult evaluate(ParseResult pr, Map root, boolean escapeForJsonOutput) { + if (pr == null) return EvaluationResult.unresolved(); // 字面量直接返回 if (pr.isLiteral) { String literal = pr.getUnquotedLiteral(); - return escapeForJsonOutput ? escapeJsonString(literal) : literal; + return EvaluationResult.resolved(escapeForJsonOutput ? escapeJsonString(literal) : literal); } // 尝试从 JSONPath 取值 Object value = getValueByJsonPath(root, pr.expression, escapeForJsonOutput); if (value != null) { - return value.toString(); + return EvaluationResult.resolved(value.toString()); } // 若未取到，则尝试 fallback @@ -361,4 +362,26 @@ public class TextTemplate { this.explicitEmptyFallback = explicitEmptyFallback; } } + + /** + * 表达式求值结果。 + * resolved 表示表达式已成功命中，即使最终字符串为空，也不应视为缺参。 + */ + private static class EvaluationResult { + final boolean resolved; + final String value; + + private EvaluationResult(boolean resolved, String value) { + this.resolved = resolved; + this.value = value == null ? "" : value; + } + + static EvaluationResult resolved(String value) { + return new EvaluationResult(true, value); + } + + static EvaluationResult unresolved() { + return new EvaluationResult(false, ""); + } + } } diff --git a/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/ChainTemplateContextTest.java b/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/ChainTemplateContextTest.java new file mode 100644 index 0000000..04a1e0e --- /dev/null +++ b/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/ChainTemplateContextTest.java @@ -0,0 +1,35 @@ +package com.easyagents.flow.core.test; + +import com.easyagents.flow.core.chain.ChainState; +import com.easyagents.flow.core.chain.Parameter; +import com.easyagents.flow.core.chain.RefType; +import com.easyagents.flow.core.node.StartNode; +import org.junit.Assert; +import org.junit.Test; + +import java.util.Collections; +import java.util.Map; + +/** + * 验证固定值模板在运行时可以直接读取链路 memory 中的节点作用域变量。 + */ +public class ChainTemplateContextTest { + + @Test + public void shouldResolveScopedNumericMemoryKeyInFixedParameterTemplate() { + ChainState state = new ChainState(); + state.getMemory().put("node_1.123", "7"); + + Parameter parameter = new Parameter(); + parameter.setName("nextValue"); + parameter.setRefType(RefType.FIXED); + parameter.setValue("{{node_1.123}}"); + + StartNode node = new StartNode(); + node.setName("开始节点"); + + Map result = state.resolveParameters(node, Collections.singletonList(parameter)); + + Assert.assertEquals("7", result.get("nextValue")); + } +} diff --git a/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/LoopNodeProgressContextTest.java b/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/LoopNodeProgressContextTest.java new file mode 100644 index 0000000..bfa2969 --- /dev/null +++ b/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/LoopNodeProgressContextTest.java @@ -0,0 +1,145 @@ +package com.easyagents.flow.core.test; + +import com.easyagents.flow.core.chain.*; +import com.easyagents.flow.core.chain.repository.ChainDefinitionRepository; +import com.easyagents.flow.core.chain.repository.InMemoryChainStateRepository; +import com.easyagents.flow.core.chain.repository.InMemoryNodeStateRepository; +import com.easyagents.flow.core.chain.runtime.ChainExecutor; +import com.easyagents.flow.core.node.BaseNode; +import com.easyagents.flow.core.node.EndNode; +import com.easyagents.flow.core.node.LoopNode; +import com.easyagents.flow.core.node.StartNode; +import org.junit.Assert; +import org.junit.Test; + +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; + +/** + * 验证循环体内可以读取父循环节点上一轮的最新输出。 + */ +public class LoopNodeProgressContextTest { + + @Test + public void shouldExposeLatestLoopOutputInsideLoopBody() { + ChainDefinition definition = new ChainDefinition(); + definition.setId("loop-progress-test"); + + StartNode startNode = new StartNode(); + startNode.setId("start"); + startNode.setName("开始节点"); + startNode.setParameters(Collections.singletonList(inputParameter("times"))); + + LoopNode loopNode = new LoopNode(); + loopNode.setId("loop"); + loopNode.setName("循环节点"); + Parameter loopVar = new Parameter(); + loopVar.setName("times"); + loopVar.setRef("times"); + loopVar.setRefType(RefType.REF); + loopNode.setLoopVar(loopVar); + + AccumulatorNode accumulatorNode = new AccumulatorNode("loop"); + accumulatorNode.setId("acc"); + accumulatorNode.setName("累计节点"); + accumulatorNode.setParentId("loop"); + + Parameter loopOutput = new Parameter(); + loopOutput.setName("current"); + loopOutput.setRef("acc.current"); + loopOutput.setRefType(RefType.REF); + loopNode.setOutputDefs(Collections.singletonList(loopOutput)); + + EndNode endNode = new EndNode(); + endNode.setId("end"); + endNode.setName("结束节点"); + Parameter result = new Parameter(); + result.setName("result"); + result.setRef("loop.current"); + result.setRefType(RefType.REF); + endNode.setOutputDefs(Collections.singletonList(result)); + + definition.addNode(startNode); + definition.addNode(loopNode); + definition.addNode(accumulatorNode); + definition.addNode(endNode); + definition.addEdge(edge("e1", "start", "loop")); + definition.addEdge(edge("e2", "loop", "acc")); + definition.addEdge(edge("e3", "loop", "end")); + + ChainExecutor executor = new ChainExecutor(new FixedDefinitionRepository(definition), + new InMemoryChainStateRepository(), + new InMemoryNodeStateRepository()); + + Map variables = new HashMap<>(); + variables.put("times", 2); + + Map resultMap = executor.execute("loop-progress-test", variables); + + Assert.assertEquals(java.util.Arrays.asList("1", "2"), resultMap.get("result")); + } + + private static Parameter inputParameter(String name) { + Parameter parameter = new Parameter(); + parameter.setName(name); + parameter.setRefType(RefType.INPUT); + parameter.setRequired(true); + return parameter; + } + + private static Edge edge(String id, String source, String target) { + Edge edge = new Edge(); + edge.setId(id); + edge.setSource(source); + edge.setTarget(target); + return edge; + } + + private static class FixedDefinitionRepository implements ChainDefinitionRepository { + private final ChainDefinition definition; + + private FixedDefinitionRepository(ChainDefinition definition) { + this.definition = definition; + } + + @Override + public ChainDefinition getChainDefinitionById(String id) { + return definition; + } + } + + /** + * 每一轮都读取父循环节点上一轮的 current，再计算新的结果。 + */ + private static class AccumulatorNode extends BaseNode { + private final String loopNodeId; + + private AccumulatorNode(String loopNodeId) { + this.loopNodeId = loopNodeId; + } + + @Override + public Map execute(Chain chain) { + Object previous = chain.getState().resolveValue(loopNodeId + ".current"); + Object indexValue = chain.getState().resolveValue(loopNodeId + ".index"); + int index = indexValue instanceof Number + ? ((Number) indexValue).intValue() + : Integer.parseInt(String.valueOf(indexValue)); + + if (index == 0) { + Assert.assertEquals("", previous); + } else if (index == 1) { + Assert.assertEquals("1", previous); + } + + String current = index == 0 + ? "1" + : String.valueOf(Integer.parseInt(String.valueOf(previous)) + 1); + + Map result = new HashMap<>(); + result.put("current", current); + return result; + } + } +} diff --git a/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/TextTemplatePathTest.java b/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/TextTemplatePathTest.java index e47427d..38f98f6 100644 --- a/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/TextTemplatePathTest.java +++ b/easy-agents-flow/src/test/java/com/easyagents/flow/core/test/TextTemplatePathTest.java @@ -4,6 +4,8 @@ import com.easyagents.flow.core.util.TextTemplate; import org.junit.Assert; import org.junit.Test; +import java.util.Arrays; +import java.util.Collections; import java.util.HashMap; import java.util.Map; @@ -21,4 +23,25 @@ public class TextTemplatePathTest { Assert.assertEquals("你好啊", result); } + + @Test + public void shouldResolveFlatScopedNumericKeyFromMergedContext() { + Map memory = new HashMap<>(); + memory.put("node_1.123", "7"); + + String result = TextTemplate.of("{{node_1.123}}") + .formatToString(Arrays.asList(memory, Collections.emptyMap())); + + Assert.assertEquals("7", result); + } + + @Test + public void shouldAllowResolvedEmptyStringWithoutTreatingItAsMissing() { + Map parameters = new HashMap<>(); + parameters.put("node_1.current", ""); + + String result = TextTemplate.of("value={{node_1.current}}").formatToString(parameters); + + Assert.assertEquals("value=", result); + } }