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)
			}
		})
	}
}