feat(sdk-python): Port in-line expressions to Python SDK (#1166)

Ports #1076 and #1164 SDK changes to Python.

sdk-java/src/main/java/io/littlehorse/sdk/wfsdk/WfRunVariable.java

@@ -214,5 +214,5 @@ public interface WfRunVariable extends LHExpression {
      * provided by the Json Path is mutated.
      * @param rhs is the value to set this WfRunVariable to.
      */
-    void assignTo(Serializable rhs);
+    void assign(Serializable rhs);
 }

sdk-java/src/main/java/io/littlehorse/sdk/wfsdk/internal/WfRunVariableImpl.java

@@ -37,9 +37,14 @@ class WfRunVariableImpl implements WfRunVariable {
 
     public WfRunVariableImpl(String name, Object typeOrDefaultVal, WorkflowThreadImpl parent) {
         this.name = name;
-        this.typeOrDefaultVal = typeOrDefaultVal;
         this.parent = parent;
 
+        if (typeOrDefaultVal == null) {
+            throw new IllegalArgumentException(
+                    "The 'typeOrDefaultVal' argument must be either a VariableType or a default value, but a null value was provided.");
+        }
+        this.typeOrDefaultVal = typeOrDefaultVal;
+
         // As per GH Issue #582, the default is now PRIVATE_VAR.
         this.accessLevel = WfRunVariableAccessLevel.PRIVATE_VAR;
         initializeType();
@@ -49,13 +54,8 @@ private void initializeType() {
         if (typeOrDefaultVal instanceof VariableType) {
             this.type = (VariableType) typeOrDefaultVal;
         } else {
-            try {
-                this.defaultValue = LHLibUtil.objToVarVal(typeOrDefaultVal);
-                this.type = LHLibUtil.fromValueCase(defaultValue.getValueCase());
-            } catch (LHSerdeError e) {
-                throw new IllegalArgumentException(
-                        "Was unable to convert provided default value to LH Variable Type", e);
-            }
+            setDefaultValue(typeOrDefaultVal);
+            this.type = LHLibUtil.fromValueCase(defaultValue.getValueCase());
         }
     }
 
@@ -98,15 +98,21 @@ public WfRunVariable required() {
 
     @Override
     public WfRunVariable withDefault(Object defaultVal) {
+        setDefaultValue(defaultVal);
+
+        if (!LHLibUtil.fromValueCase(defaultValue.getValueCase()).equals(type)) {
+            throw new IllegalArgumentException("Default value type does not match LH variable type " + type);
+        }
+
+        return this;
+    }
+
+    private void setDefaultValue(Object defaultVal) {
         try {
-            VariableValue attempt = LHLibUtil.objToVarVal(defaultVal);
-            if (!LHLibUtil.fromValueCase(attempt.getValueCase()).equals(type)) {
-                throw new IllegalArgumentException("Default value type does not match variable type");
-            }
+            this.defaultValue = LHLibUtil.objToVarVal(defaultVal);
         } catch (LHSerdeError e) {
             throw new IllegalArgumentException("Was unable to convert provided default value to LH Variable Type", e);
         }
-        return this;
     }
 
     @Override
@@ -175,7 +181,7 @@ public WorkflowConditionImpl isNotIn(Serializable rhs) {
     }
 
     @Override
-    public void assignTo(Serializable rhs) {
+    public void assign(Serializable rhs) {
         parent.mutate(this, VariableMutationType.ASSIGN, rhs);
     }
 

sdk-java/src/test/java/io/littlehorse/sdk/wfsdk/internal/WorkflowThreadImplTest.java

@@ -550,7 +550,7 @@ void mutationsShouldUseVariableAssignment() {
         // Deprecated the literal_value and node_output approach
         Workflow workflow = new WorkflowImpl("obiwan", wf -> {
             WfRunVariable myVar = wf.addVariable("my-var", VariableType.STR);
-            myVar.assignTo("some-value");
+            myVar.assign("some-value");
         });
 
         PutWfSpecRequest wfSpec = workflow.compileWorkflow();
@@ -570,7 +570,7 @@ void nodeOutputMutationsShouldAlsoUseVariableAssignments() {
         // Deprecated the literal_value and node_output approach
         Workflow workflow = new WorkflowImpl("obiwan", wf -> {
             WfRunVariable myVar = wf.addVariable("my-var", VariableType.STR);
-            myVar.assignTo(wf.execute("use-the-force"));
+            myVar.assign(wf.execute("use-the-force"));
         });
 
         PutWfSpecRequest wfSpec = workflow.compileWorkflow();
@@ -590,7 +590,7 @@ void nodeOutputMutationsShouldCarryJsonPath() {
         // Deprecated the literal_value and node_output approach
         Workflow workflow = new WorkflowImpl("obiwan", wf -> {
             WfRunVariable myVar = wf.addVariable("my-var", VariableType.STR);
-            myVar.assignTo(wf.execute("use-the-force").jsonPath("$.hello.there"));
+            myVar.assign(wf.execute("use-the-force").jsonPath("$.hello.there"));
         });
 
         PutWfSpecRequest wfSpec = workflow.compileWorkflow();
@@ -614,7 +614,7 @@ void assigningVariablesToOtherVariablesShouldUseVariableAssignment() {
         Workflow workflow = new WorkflowImpl("obiwan", wf -> {
             WfRunVariable myVar = wf.addVariable("my-var", VariableType.STR);
             WfRunVariable otherVar = wf.addVariable("other-var", VariableType.STR);
-            myVar.assignTo(otherVar);
+            myVar.assign(otherVar);
         });
 
         PutWfSpecRequest wfSpec = workflow.compileWorkflow();
@@ -632,7 +632,7 @@ void assigningVariablesToOtherVariablesShouldCarryJsonPath() {
         Workflow workflow = new WorkflowImpl("obiwan", wf -> {
             WfRunVariable myVar = wf.addVariable("my-var", VariableType.STR);
             WfRunVariable otherVar = wf.addVariable("other-var", VariableType.JSON_OBJ);
-            myVar.assignTo(otherVar.jsonPath("$.hello.there"));
+            myVar.assign(otherVar.jsonPath("$.hello.there"));
         });
 
         PutWfSpecRequest wfSpec = workflow.compileWorkflow();

sdk-python/examples/basic/example_basic.py

@@ -46,4 +46,4 @@ async def main() -> None:
 
 
 if __name__ == "__main__":
-    asyncio.run(main())
+    asyncio.run(main())