refactor: better project structure (#35)

This project is starting to grow, and I've seen flaws in the initial
project structure design
I think I'll restructure the entire project directory for better
scalability and also cleaner

integration/shell/adapter_test.go

@@ -0,0 +1,50 @@
+package shell
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestScanPosixAliases(t *testing.T) {
+
+	input := `
+alias gca='git commit -a'
+alias ta="tmux a -t" # this is a comment
+# alias hidden="not found"
+alias l='ls' ll='ls -l'
+`
+	expected := map[string]string{
+		"gca": "git commit -a",
+		"ta":  "tmux a -t",
+		"l":   "ls",
+		"ll":  "ls -l",
+	}
+
+	got := ParseAliases(input)
+	if !reflect.DeepEqual(got, expected) {
+		t.Errorf("ScanPosixAliases() = %v; want %v", got, expected)
+	}
+}
+
+func TestSplitAliasTokens(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected []string
+	}{
+
+		{"Single", "a='b'", []string{"a='b'"}},
+		{"Multi", "a='b' c=\"d\"", []string{"a='b'", "c=\"d\""}},
+
+		{"With Space", "ta='tmux a -t' l='ls -l'", []string{"ta='tmux a -t'", "l='ls -l'"}},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := SplitAliasTokens(tt.input)
+			if !reflect.DeepEqual(got, tt.expected) {
+				t.Errorf("SplitAliasTokens(%q) = %v; want %v", tt.input, got, tt.expected)
+			}
+		})
+	}
+}