github.com/tilt-dev/tilt@v0.33.15-0.20240515162809-0a22ed45d8a0/internal/tiltfile/io/io_test.go (about)

     1  package io
     2  
     3  import (
     4  	"testing"
     5  
     6  	"github.com/stretchr/testify/require"
     7  
     8  	"github.com/tilt-dev/tilt/internal/testutils"
     9  	"github.com/tilt-dev/tilt/internal/tiltfile/starkit"
    10  	"github.com/tilt-dev/tilt/internal/tiltfile/starlarkstruct"
    11  )
    12  
    13  func TestReadFile(t *testing.T) {
    14  	f := newFixture(t)
    15  
    16  	f.File("foo.txt", "foo")
    17  	f.File("Tiltfile", `
    18  s = read_file('foo.txt')
    19  
    20  load('assert.tilt', 'assert')
    21  
    22  assert.equals('foo', str(s))
    23  `)
    24  
    25  	_, err := f.ExecFile("Tiltfile")
    26  	require.NoError(t, err)
    27  }
    28  
    29  func TestReadFileDefault(t *testing.T) {
    30  	f := newFixture(t)
    31  
    32  	f.File("Tiltfile", `
    33  s = read_file('dne.txt', 'foo')
    34  
    35  load('assert.tilt', 'assert')
    36  
    37  assert.equals('foo', str(s))
    38  `)
    39  
    40  	_, err := f.ExecFile("Tiltfile")
    41  	require.NoError(t, err)
    42  }
    43  
    44  func TestReadFileDefaultEmptyString(t *testing.T) {
    45  	f := newFixture(t)
    46  
    47  	f.File("Tiltfile", `
    48  s = read_file('dne.txt', '')
    49  
    50  load('assert.tilt', 'assert')
    51  
    52  assert.equals('', str(s))
    53  `)
    54  
    55  	_, err := f.ExecFile("Tiltfile")
    56  	require.NoError(t, err)
    57  }
    58  
    59  // make sure we generate an error on invalid type for default even if the file exists
    60  func TestReadFileInvalidDefaultFileExists(t *testing.T) {
    61  	f := newFixture(t)
    62  
    63  	f.File("foo.txt", "foo")
    64  	f.File("Tiltfile", `
    65  s = read_file('foo.txt', 5)
    66  `)
    67  
    68  	_, err := f.ExecFile("Tiltfile")
    69  	require.Error(t, err)
    70  	require.Contains(t, err.Error(), "parameter default: expected starlark.String or None, got starlark.Int")
    71  }
    72  
    73  func TestReadFileMissing(t *testing.T) {
    74  	f := newFixture(t)
    75  
    76  	f.File("Tiltfile", `
    77  s = read_file('dne.txt')
    78  `)
    79  
    80  	_, err := f.ExecFile("Tiltfile")
    81  	require.Error(t, err)
    82  	testutils.AssertIsNotExist(t, err)
    83  	require.Contains(t, err.Error(), "dne.txt")
    84  }
    85  
    86  func newFixture(t *testing.T) *starkit.Fixture {
    87  	f := starkit.NewFixture(t, NewPlugin(), starlarkstruct.NewPlugin())
    88  	f.UseRealFS()
    89  	f.File("assert.tilt", `
    90  def equals(expected, observed):
    91  	if expected != observed:
    92  		fail("expected: '%s'. observed: '%s'" % (expected, observed))
    93  
    94  assert = struct(equals=equals)
    95  `)
    96  	return f
    97  }