/
parse_test.go
318 lines (256 loc) · 7.39 KB
/
parse_test.go
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package viron_test
import (
"fmt"
"math"
"os"
"reflect"
"github.com/ryanmoran/viron"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Parse", func() {
var env *Environment
BeforeEach(func() {
env = &Environment{}
t := reflect.TypeOf(env).Elem()
for i := 0; i < t.NumField(); i++ {
field := t.Field(i)
name := field.Tag.Get("env")
os.Setenv(name, "")
}
os.Setenv("REQUIRED", "banana")
})
Context("bool values", func() {
It("parses valid bool values", func() {
validTrues := []string{"1", "t", "T", "true", "TRUE", "True"}
validFalses := []string{"0", "f", "F", "false", "FALSE", "False"}
for _, value := range validTrues {
os.Setenv("BOOL", value)
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Bool).To(BeTrue())
}
for _, value := range validFalses {
os.Setenv("BOOL", value)
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Bool).To(BeFalse())
}
})
It("returns an error when the bool value cannot be parsed", func() {
os.Setenv("BOOL", "banana")
err := viron.Parse(env)
Expect(err).To(Equal(viron.ParseError{
Name: "BOOL",
Value: "banana",
Kind: "bool",
}))
})
})
Context("string values", func() {
It("parses string values", func() {
os.Setenv("STRING", "banana")
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.String).To(Equal("banana"))
})
})
Context("integer values", func() {
It("parses int values", func() {
os.Setenv("INT", fmt.Sprintf("%d", MaxInt))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Int).To(Equal(MaxInt))
})
It("parses int8 values", func() {
os.Setenv("INT8", fmt.Sprintf("%d", MaxInt8))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Int8).To(Equal(MaxInt8))
})
It("parses int16 values", func() {
os.Setenv("INT16", fmt.Sprintf("%d", MaxInt16))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Int16).To(Equal(MaxInt16))
})
It("parses int32 values", func() {
os.Setenv("INT32", fmt.Sprintf("%d", MaxInt32))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Int32).To(Equal(MaxInt32))
})
It("parses int64 values", func() {
os.Setenv("INT64", fmt.Sprintf("%d", MaxInt64))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Int64).To(Equal(MaxInt64))
})
It("returns an error when the int value cannot be parsed", func() {
os.Setenv("INT16", "banana")
err := viron.Parse(env)
Expect(err).To(Equal(viron.ParseError{
Name: "INT16",
Value: "banana",
Kind: "int16",
}))
})
})
Context("unsigned integer values", func() {
It("parses uint values", func() {
os.Setenv("UINT", fmt.Sprintf("%d", MaxUint))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Uint).To(Equal(MaxUint))
})
It("parses uint8 values", func() {
os.Setenv("UINT8", fmt.Sprintf("%d", MaxUint8))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Uint8).To(Equal(MaxUint8))
})
It("parses uint16 values", func() {
os.Setenv("UINT16", fmt.Sprintf("%d", MaxUint16))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Uint16).To(Equal(MaxUint16))
})
It("parses uint32 values", func() {
os.Setenv("UINT32", fmt.Sprintf("%d", MaxUint32))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Uint32).To(Equal(MaxUint32))
})
It("parses uint64 values", func() {
os.Setenv("UINT64", fmt.Sprintf("%d", MaxUint64))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Uint64).To(Equal(MaxUint64))
})
It("parses uintptr values", func() {
os.Setenv("UINTPTR", fmt.Sprintf("%d", MaxUintptr))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Uintptr).To(Equal(MaxUintptr))
})
It("returns an error when the uint value cannot be parsed", func() {
os.Setenv("UINT32", "banana")
err := viron.Parse(env)
Expect(err).To(Equal(viron.ParseError{
Name: "UINT32",
Value: "banana",
Kind: "uint32",
}))
})
})
Context("float values", func() {
It("parses float32 values", func() {
os.Setenv("FLOAT32", fmt.Sprintf("%f", math.MaxFloat32))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Float32).To(Equal(float32(math.MaxFloat32)))
})
It("parses float64 values", func() {
os.Setenv("FLOAT64", fmt.Sprintf("%f", math.MaxFloat64))
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Float64).To(Equal(math.MaxFloat64))
})
It("returns an error when the float value cannot be parsed", func() {
os.Setenv("FLOAT64", "banana")
err := viron.Parse(env)
Expect(err).To(Equal(viron.ParseError{
Name: "FLOAT64",
Value: "banana",
Kind: "float64",
}))
})
})
Context("struct fields", func() {
It("parses the variable as JSON", func() {
os.Setenv("JSON", `{"space":"RGB", "point":{"r":98, "g":218, "b":255}}`)
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.JSON.Space).To(Equal("RGB"))
Expect(env.JSON.Point.R).To(Equal(98))
Expect(env.JSON.Point.G).To(Equal(218))
Expect(env.JSON.Point.B).To(Equal(255))
})
It("returns an error when the JSON cannot be parsed", func() {
os.Setenv("JSON", "banana")
err := viron.Parse(env)
Expect(err).To(Equal(viron.ParseError{
Name: "JSON",
Value: "banana",
Kind: "struct",
}))
})
})
Context("byte slice fields", func() {
It("parses the variable from a string to a byte slice", func() {
os.Setenv("BYTESLICE", "SOMETHING")
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.ByteSlice).To(Equal([]byte("SOMETHING")))
})
})
Context("when the environment passed-in is not a non-zero pointer", func() {
It("returns an InvalidArgumentError", func() {
err := viron.Parse(7)
Expect(err).To(Equal(viron.InvalidArgumentError{
Value: 7,
}))
})
It("returns an InvalidArgumentError", func() {
var actualEnv *Environment
var expectedEnv *Environment
err := viron.Parse(actualEnv)
Expect(err).To(Equal(viron.InvalidArgumentError{
Value: expectedEnv,
}))
})
})
Context("non-required values", func() {
It("leaves unassigned", func() {
emptyEnv := Environment{
Required: "banana",
Default: "banana",
}
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(*env).To(Equal(emptyEnv))
})
})
Context("unexported fields", func() {
It("ignores them", func() {
os.Setenv("UNEXPORTED", "banana")
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.unexported).To(Equal(""))
})
})
Context("non-tagged fields", func() {
It("ignores them", func() {
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.NonTagged).To(Equal(struct{}{}))
})
})
Context("required fields", func() {
It("returns an error if the variable is missing", func() {
os.Setenv("REQUIRED", "")
err := viron.Parse(env)
Expect(err).To(Equal(viron.RequiredFieldError{
Name: "REQUIRED",
}))
})
})
Context("default fields", func() {
It("uses the default value if none can be found", func() {
os.Setenv("DEFAULT", "")
err := viron.Parse(env)
Expect(err).NotTo(HaveOccurred())
Expect(env.Default).To(Equal("banana"))
})
})
})