Update documentation and fix command executions

Author: SimonBaeumer

README.md

@@ -8,6 +8,10 @@
 
 A simple package to execute shell commands on linux, darwin and windows.
 
+## Installation
+
+`$ go get -u github.com/SimonBaeumer/[email protected]`
+
 ## Usage
 
 ```go
@@ -25,7 +29,7 @@ fmt.Println(cmd.Stderr())
 ### Stream output to stderr and stdout
 
 ```go
-cmd := NewCommand("echo hello", WithStandardStreams)
+cmd := NewCommand("echo hello", cmd.WithStandardStreams)
 cmd.Execute()
 ```
 
@@ -54,8 +58,4 @@ make test
 
 ### ToDo
 
- - Reports
-    - Coverage reports
-    - Go report
-    - Codeclimate
  - os.Stdout and os.Stderr output access after execution

command_darwin.go

@@ -6,7 +6,7 @@ import (
 )
 
 func createBaseCommand(c *Command) *exec.Cmd {
-	cmd := exec.Command("/bin/sh", "-Command", c.Command)
+	cmd := exec.Command("/bin/sh", "-c", c.Command)
 	return cmd
 }
 

command_darwin_test.go

@@ -11,7 +11,7 @@ func TestCommand_ExecuteStderr(t *testing.T) {
 	err := cmd.Execute()
 
 	assert.Nil(t, err)
-	assert.Equal(t, "hello", cmd.Stderr())
+	assert.Equal(t, "hello\n", cmd.Stderr())
 }
 
 func TestCommand_WithTimeout(t *testing.T) {

command_test.go

@@ -22,7 +22,11 @@ func TestCommand_Execute(t *testing.T) {
 
 	assert.Nil(t, err)
 	assert.True(t, cmd.Executed())
-	assert.Equal(t, cmd.Stdout(), "hello\n")
+	if runtime.GOOS == "windows" {
+		assert.Equal(t, cmd.Stdout(), "hello\r\n")
+	} else {
+		assert.Equal(t, cmd.Stdout(), "hello\n")
+	}
 }
 
 func TestCommand_ExitCode(t *testing.T) {

command_windows.go

@@ -6,7 +6,7 @@ import (
 )
 
 func createBaseCommand(c *Command) *exec.Cmd {
-	cmd := exec.Command(`Command:\windows\system32\cmd.exe`, "/C", c.Command)
+	cmd := exec.Command(`C:\windows\system32\cmd.exe`, "/C", c.Command)
 	return cmd
 }