Add YARP fixtures to test that String literal in when clause becomes frozen

Author: andrykonchin

spec/truffle/parsing/fixtures/case/with_expression_and_when/with_string_literal_in_when_clause.yaml

@@ -0,0 +1,56 @@
+subject: "case expression"
+description: "with expression to match / and String literal in when clause (case exp when 'string' ... end)"
+notes: >
+  String becomes frozen and is represented as FrozenStringLiteralNode
+focused_on_node: "org.truffleruby.language.control.IfElseNode"
+ruby: |
+  case 42
+  when "foo"
+    true
+  end
+ast: |
+  IfElseNodeGen
+      attributes:
+          flags = 0
+          sourceCharIndex = -1
+          sourceLength = 0
+      children:
+          condition =
+              InlinedCaseEqualNodeGen
+                  attributes:
+                      assumptions = [Assumption(valid, name=set_trace_func is not used)]
+                      flags = 0
+                      integerCaseEqualAssumption = Assumption(valid, name=inlined Integer#===)
+                      parameters = RubyCallNodeParameters{methodName='===', descriptor=NoKeywordArgumentsDescriptor, isSplatted=false, ignoreVisibility=true, isVCall=false, isSafeNavigation=false, isAttrAssign=false}
+                      sourceCharIndex = -1
+                      sourceLength = 0
+                  children:
+                      leftNode_ =
+                          FrozenStringLiteralNode
+                              attributes:
+                                  definition = expression
+                                  flags = 0
+                                  frozenString = foo
+                                  sourceCharIndex = 13
+                                  sourceLength = 5
+                      rightNode_ =
+                          ReadLocalVariableNode
+                              attributes:
+                                  flags = 0
+                                  frameSlot = 2 # %case_0
+                                  sourceCharIndex = -1
+                                  sourceLength = 0
+                                  type = FRAME_LOCAL
+          elseBody =
+              NilLiteralNode
+                  attributes:
+                      flags = 0
+                      sourceCharIndex = -1
+                      sourceLength = 0
+          thenBody =
+              BooleanLiteralNode
+                  attributes:
+                      flags = 1
+                      sourceCharIndex = 21
+                      sourceLength = 4
+                      value = true

spec/truffle/parsing/fixtures/case/without_expression_and_when/with_string_literal_in_when_clause.yaml

@@ -0,0 +1,38 @@
+subject: "case expression"
+description: "without expression to match / and String literal in when clause (case exp when 'string' ... end)"
+notes: >
+  String becomes frozen and is represented as FrozenStringLiteralNode
+focused_on_node: "org.truffleruby.language.control.IfElseNode"
+ruby: |
+  case
+  when "foo"
+    true
+  end
+ast: |
+  IfElseNodeGen
+      attributes:
+          flags = 1
+          sourceCharIndex = 0
+          sourceLength = 26
+      children:
+          condition =
+              FrozenStringLiteralNode
+                  attributes:
+                      definition = expression
+                      flags = 0
+                      frozenString = foo
+                      sourceCharIndex = 10
+                      sourceLength = 5
+          elseBody =
+              NilLiteralNode
+                  attributes:
+                      flags = 0
+                      sourceCharIndex = -1
+                      sourceLength = 0
+          thenBody =
+              BooleanLiteralNode
+                  attributes:
+                      flags = 1
+                      sourceCharIndex = 18
+                      sourceLength = 4
+                      value = true