asteris-llc/converge

// Copyright © 2016 Asteris, LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package control_test

import (
    "reflect"
    "testing"

    "github.com/asteris-llc/converge/parse"
    "github.com/asteris-llc/converge/parse/preprocessor/switch"
    "github.com/stretchr/testify/assert"
    "github.com/stretchr/testify/require"
)

var sampleInnerHCL = `
        task.query "foo" {
            query = "echo foo"
        }
`

// TestIsSwitch tests code that checks a parse node to see if it's as switch
func TestIsSwitch(t *testing.T) {
    var sampleStatement = `
switch "named-switch" {
    case "eq 1 0" "a" {
        task.query "foo" {
            query = "echo foo"
        }
    }
    case "eq ` + "`foo` `foo`" + ` " "b" {
        task.query "bar" {
            query = "echo bar"
        }
    }
    case "eq 0 1" "c" {
        task.query "baz" {
            query = "echo baz"
        }
    }
}

task.query "query" {
    query = "echo foo"
}
`

    nodes, err := parse.Parse([]byte(sampleStatement))
    require.NoError(t, err)
    t.Run("returns true when node is a switch", func(t *testing.T) {
        switchNode := nodes[0]
        assert.True(t, control.IsSwitchNode(switchNode))
    })
    t.Run("returns false when node is not switch", func(t *testing.T) {
        notSwitchNode := nodes[1]
        assert.False(t, control.IsSwitchNode(notSwitchNode))
    })
}

// TestLoadSwitch tests loading of a node into a switch structure
func TestLoadSwitch(t *testing.T) {
    var sampleStatement = `
switch "named-switch" {
    case "eq 1 0" "a" {
        task.query "foo" {
            query = "echo foo"
        }
    }
    case "eq ` + "`foo` `foo`" + ` " "b" {
        task.query "bar" {
            query = "echo bar"
        }
    }
    case "eq 0 1" "c" {
        task.query "baz" {
            query = "echo baz"
        }
    }
}

task.query "query" {
    query = "echo foo"
}
`

    sampleCaseSlice := []*control.Case{
        &control.Case{
            Name:      "a",
            Predicate: "eq 1 0",
        },
        &control.Case{
            Name:      "b",
            Predicate: "eq `foo` `foo`",
        },
        &control.Case{
            Name:      "c",
            Predicate: "eq 0 1",
        },
    }
    nodes, err := parse.Parse([]byte(sampleStatement))
    require.NoError(t, err)
    t.Run("returns a switch with the correct name", func(t *testing.T) {
        switchStatement, err := control.NewSwitch(nodes[0], []byte(sampleStatement))
        assert.NoError(t, err)
        assert.Equal(t, "named-switch", switchStatement.Name)
    })
    t.Run("returns a switch with the inner node set", func(t *testing.T) {
        switchStatement, err := control.NewSwitch(nodes[0], []byte(sampleStatement))
        assert.NoError(t, err)
        assert.Equal(t, nodes[0], switchStatement.Node)
    })
    t.Run("returns a switch with a list of Cases", func(t *testing.T) {
        switchStatement, err := control.NewSwitch(nodes[0], []byte(sampleStatement))
        assert.NoError(t, err)
        assert.Equal(t, len(sampleCaseSlice), len(switchStatement.Branches))
        for idx, branch := range switchStatement.Branches {
            c := sampleCaseSlice[idx]
            c.InnerNodes = branch.InnerNodes
            assert.Equal(t, c, branch)
        }
    })
}

// TestSwitchNode tests the generation of a *parse.Node with the correct
// metadata about the switch node
func TestSwitchNode(t *testing.T) {
    var sampleStatement = `
switch "named-switch" {
    case "eq 1 0" "a" {
        task.query "foo" {
            query = "echo foo"
        }
    }
    case "eq ` + "`foo` `foo`" + ` " "b" {
        task.query "bar" {
            query = "echo bar"
        }
    }
    case "eq 0 1" "c" {
        task.query "baz" {
            query = "echo baz"
        }
    }
}

task.query "query" {
    query = "echo foo"
}
`

    nodes, err := parse.Parse([]byte(sampleStatement))
    require.NoError(t, err)
    switchObj, err := control.NewSwitch(nodes[0], []byte(sampleStatement))
    require.NoError(t, err)
    switchNode, err := switchObj.GenerateNode()
    require.NoError(t, err)
    t.Run("sets the node key to macro.switch", func(t *testing.T) {
        assert.Equal(t, "macro.switch", switchNode.Kind())
    })
}

// TestParseSwitchConditionalWithCase contains tests for parsing a case
// statement
func TestParseSwitchConditionalWithCase(t *testing.T) {
    var sampleCase = `
switch "named-switch" {
    case "eq 1 0" "a" {
        task.query "foo" {
            query = "echo foo"
        }
    }
}
`
    nodes, err := parse.Parse([]byte(sampleCase))
    require.NoError(t, err)
    assert.True(t, len(nodes) > 0)
    switchNode, err := control.NewSwitch(nodes[0], []byte(sampleCase))
    require.NoError(t, err)
    require.True(t, len(switchNode.Branches) > 0)
    parsedCase := switchNode.Branches[0]
    t.Run("sets the name", func(t *testing.T) {
        assert.Equal(t, "a", parsedCase.Name)
    })
    t.Run("sets the predicate", func(t *testing.T) {
        assert.Equal(t, "eq 1 0", parsedCase.Predicate)
    })
    t.Run("sets the inner node to the parsed inner node", func(t *testing.T) {
        expected, err := parse.Parse([]byte(sampleInnerHCL))
        require.NoError(t, err)
        assert.Equal(t, expected, parsedCase.InnerNodes)
        assert.True(t, reflect.DeepEqual(expected, parsedCase.InnerNodes))
    })
}

// TestParseSwitchConditionalWithDefault contains tests for parsing a default
// case statement
func TestParseSwitchConditionalWithDefault(t *testing.T) {
    var sampleDefault = `
switch "named-switch" {
    default {
        task.query "foo" {
            query = "echo foo"
        }
    }
}
`
    nodes, err := parse.Parse([]byte(sampleDefault))
    require.NoError(t, err)
    assert.True(t, len(nodes) > 0)
    switchNode, err := control.NewSwitch(nodes[0], []byte(sampleDefault))
    require.NoError(t, err)
    require.True(t, len(switchNode.Branches) > 0)
    parsedCase := switchNode.Branches[0]

    t.Run("sets the name", func(t *testing.T) {
        assert.Equal(t, "default", parsedCase.Name)
    })
    t.Run("sets the predicate", func(t *testing.T) {
        assert.Equal(t, "true", parsedCase.Predicate)
    })
    t.Run("sets the inner node to the parsed inner node", func(t *testing.T) {
        expected, err := parse.Parse([]byte(sampleInnerHCL))
        require.NoError(t, err)
        assert.Equal(t, expected, parsedCase.InnerNodes)
        assert.True(t, reflect.DeepEqual(expected, parsedCase.InnerNodes))
    })
}

// TestInnerText ensures that we correctly extract the text from the inside of a
// node.
func TestInnerText(t *testing.T) {
    var sampleStatement = `
switch "named-switch" {
    case "eq 1 0" "a" {
        task.query "foo" {
            query = "echo foo"
        }
    }
    case "eq ` + "`foo` `foo`" + ` " "b" {
        task.query "bar" {
            query = "echo bar"
        }
    }
    case "eq 0 1" "c" {
        task.query "baz" {
            query = "echo baz"
        }
    }
}

task.query "query" {
    query = "echo foo"
}
`

    nodes, err := parse.Parse([]byte(sampleStatement))
    require.NoError(t, err)
    assert.True(t, len(nodes) > 0)
    t.Run("gets the full inner text of a switch statement", func(t *testing.T) {
        expected := `
    case "eq 1 0" "a" {
        task.query "foo" {
            query = "echo foo"
        }
    }
    case "eq ` + "`foo` `foo`" + ` " "b" {
        task.query "bar" {
            query = "echo bar"
        }
    }
    case "eq 0 1" "c" {
        task.query "baz" {
            query = "echo baz"
        }
    }`
        actual, err := control.InnerText(nodes[0], []byte(sampleStatement))
        assert.NoError(t, err)
        assert.Equal(t, expected, string(actual))
    })
}