--wip-- [skip ci]

internal/pkg/templer/middleware_test.go

@@ -0,0 +1,75 @@
+package templer
+
+import (
+	"context"
+	"testing"
+)
+
+func TestRelativePath(t *testing.T) {
+	tests := []struct {
+		name string // description of this test case
+		// Named input parameters for target function.
+		base    string
+		relPath string
+		want    string
+		wantErr bool
+	}{
+		// TODO: Add test cases.
+		{
+			name:    "with no relative path stays the same",
+			base:    "/foo/bar",
+			relPath: "",
+			want:    "/foo/bar",
+			wantErr: false,
+		},
+		{
+			name:    "with . relative path stays the same",
+			base:    "/foo/bar",
+			relPath: ".",
+			want:    "/foo/bar",
+			wantErr: false,
+		},
+		{
+			name:    "with ./ relative path stays the same",
+			base:    "/foo/bar",
+			relPath: "./",
+			want:    "/foo/bar",
+			wantErr: false,
+		},
+
+		{
+			name:    "with .. relative path goes one up",
+			base:    "/foo/bar",
+			relPath: "..",
+			want:    "/foo",
+			wantErr: false,
+		},
+
+		{
+			name:    "with ../baz relative path replaces last element with baz",
+			base:    "/foo/bar",
+			relPath: "../baz",
+			want:    "/foo/baz",
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx := context.WithValue(t.Context(), pathKey, tt.base)
+			got, gotErr := RelativePath(ctx, tt.relPath)
+			if gotErr != nil {
+				if !tt.wantErr {
+					t.Errorf("RelativePath() failed: %v", gotErr)
+				}
+				return
+			}
+			if tt.wantErr {
+				t.Fatal("RelativePath() succeeded unexpectedly")
+			}
+			// TODO: update the condition below to compare got with tt.want.
+			if got != tt.want {
+				t.Errorf("RelativePath() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}