feat(config): interpolate recursively in interpolated map

internal/config/environment_test.go

@@ -0,0 +1,82 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/pkg/errors"
+	"gopkg.in/yaml.v3"
+)
+
+func TestInterpolatedMap(t *testing.T) {
+	type testCase struct {
+		Path   string
+		Env    map[string]string
+		Assert func(t *testing.T, parsed InterpolatedMap)
+	}
+
+	testCases := []testCase{
+		{
+			Path: "testdata/environment/interpolated-map-1.yml",
+			Env: map[string]string{
+				"TEST_PROP1":      "foo",
+				"TEST_SUB_PROP1":  "bar",
+				"TEST_SUB2_PROP1": "baz",
+			},
+			Assert: func(t *testing.T, parsed InterpolatedMap) {
+				if e, g := "foo", parsed.Data["prop1"]; e != g {
+					t.Errorf("parsed.Data[\"prop1\"]: expected '%v', got '%v'", e, g)
+				}
+
+				if e, g := "bar", parsed.Data["sub"].(map[string]any)["subProp1"]; e != g {
+					t.Errorf("parsed.Data[\"sub\"][\"subProp1\"]: expected '%v', got '%v'", e, g)
+				}
+
+				if e, g := "baz", parsed.Data["sub2"].(map[string]any)["sub2Prop1"].([]any)[0]; e != g {
+					t.Errorf("parsed.Data[\"sub2\"][\"sub2Prop1\"][0]: expected '%v', got '%v'", e, g)
+				}
+
+				if e, g := "test", parsed.Data["sub2"].(map[string]any)["sub2Prop1"].([]any)[1]; e != g {
+					t.Errorf("parsed.Data[\"sub2\"][\"sub2Prop1\"][1]: expected '%v', got '%v'", e, g)
+				}
+			},
+		},
+		{
+			Path: "testdata/environment/interpolated-map-2.yml",
+			Env: map[string]string{
+				"BAR": "bar",
+			},
+			Assert: func(t *testing.T, parsed InterpolatedMap) {
+				if e, g := "http://bar", parsed.Data["foo"]; e != g {
+					t.Errorf("parsed.Data[\"foo\"]: expected '%v', got '%v'", e, g)
+				}
+			},
+		},
+	}
+
+	for idx, tc := range testCases {
+		t.Run(fmt.Sprintf("Case #%d", idx), func(t *testing.T) {
+			data, err := os.ReadFile(tc.Path)
+			if err != nil {
+				t.Fatalf("%+v", errors.WithStack(err))
+			}
+
+			var interpolatedMap InterpolatedMap
+
+			if tc.Env != nil {
+				interpolatedMap.getEnv = func(key string) string {
+					return tc.Env[key]
+				}
+			}
+
+			if err := yaml.Unmarshal(data, &interpolatedMap); err != nil {
+				t.Fatalf("%+v", errors.WithStack(err))
+			}
+
+			if tc.Assert != nil {
+				tc.Assert(t, interpolatedMap)
+			}
+		})
+	}
+}