Building out extraction and location code.

adding tests to extactraction functions.

Signed-off-by: Dave Shanley <dave@quobix.com>

datamodel/low/extraction_functions_test.go

@@ -0,0 +1,74 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package low
+
+import (
+	"github.com/pb33f/libopenapi/index"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v3"
+	"testing"
+)
+
+func TestFindItemInMap(t *testing.T) {
+	v := make(map[KeyReference[string]]ValueReference[string])
+	v[KeyReference[string]{
+		Value: "pizza",
+	}] = ValueReference[string]{
+		Value: "pie",
+	}
+	assert.Equal(t, "pie", FindItemInMap("pizza", v).Value)
+}
+
+func TestFindItemInMap_Error(t *testing.T) {
+	v := make(map[KeyReference[string]]ValueReference[string])
+	v[KeyReference[string]{
+		Value: "pizza",
+	}] = ValueReference[string]{
+		Value: "pie",
+	}
+	assert.Nil(t, FindItemInMap("nuggets", v))
+}
+
+func TestLocateRefNode(t *testing.T) {
+
+	yml := `components:
+  schemas:
+    cake:
+      description: hello`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	yml = `$ref: '#/components/schemas/cake'`
+
+	var cNode yaml.Node
+	_ = yaml.Unmarshal([]byte(yml), &cNode)
+
+	located := LocateRefNode(cNode.Content[0], idx)
+	assert.NotNil(t, located)
+
+}
+
+func TestLocateRefNode_Path(t *testing.T) {
+
+	yml := `paths:
+  /burger/time:
+    description: hello`
+
+	var idxNode yaml.Node
+	mErr := yaml.Unmarshal([]byte(yml), &idxNode)
+	assert.NoError(t, mErr)
+	idx := index.NewSpecIndex(&idxNode)
+
+	yml = `$ref: '#/paths/~1burger~1time'`
+
+	var cNode yaml.Node
+	_ = yaml.Unmarshal([]byte(yml), &cNode)
+
+	located := LocateRefNode(cNode.Content[0], idx)
+	assert.NotNil(t, located)
+
+}