parse: Test against Pprint{AST,ParseTree}.

parse/pprint_test.go

@@ -0,0 +1,65 @@
+package parse
+
+import (
+	"bytes"
+	"testing"
+)
+
+var pprintCases = []struct {
+	src           string
+	wantAST       string
+	wantParseTree string
+}{
+	{"ls $x[0]$y[1];echo",
+		`Chunk
+  Pipeline/Form
+    Compound/Indexing/Primary Type=Bareword Value="ls" IsRange=[]
+    Compound
+      Indexing
+        Primary Type=Variable Value="x" IsRange=[]
+        Array/Compound/Indexing/Primary Type=Bareword Value="0" IsRange=[]
+      Indexing
+        Primary Type=Variable Value="y" IsRange=[]
+        Array/Compound/Indexing/Primary Type=Bareword Value="1" IsRange=[]
+  Pipeline/Form/Compound/Indexing/Primary Type=Bareword Value="echo" IsRange=[]
+`,
+		`Chunk "ls $x[0]$y[1];echo" 0-18
+  Pipeline/Form "ls $x[0]$y[1]" 0-13
+    Compound/Indexing/Primary "ls" 0-2
+    Sep " " 2-3
+    Compound "$x[0]$y[1]" 3-13
+      Indexing "$x[0]" 3-8
+        Primary "$x" 3-5
+        Sep "[" 5-6
+        Array/Compound/Indexing/Primary "0" 6-7
+        Sep "]" 7-8
+      Indexing "$y[1]" 8-13
+        Primary "$y" 8-10
+        Sep "[" 10-11
+        Array/Compound/Indexing/Primary "1" 11-12
+        Sep "]" 12-13
+  Sep ";" 13-14
+  Pipeline/Form/Compound/Indexing/Primary "echo" 14-18
+`},
+}
+
+func TestPprint(t *testing.T) {
+	for _, tc := range pprintCases {
+		n, err := Parse(tc.src)
+		if err != nil {
+			t.Error(err)
+		}
+		var b bytes.Buffer
+		PprintAST(n, &b)
+		ast := b.String()
+		if b.String() != tc.wantAST {
+			t.Errorf("PprintAST(%q):\n%s\nwant:\n%s", tc.src, ast, tc.wantAST)
+		}
+		b = bytes.Buffer{}
+		PprintParseTree(n, &b)
+		pt := b.String()
+		if pt != tc.wantParseTree {
+			t.Errorf("PprintParseTree(%q):\n%s\nwant:\n%s", tc.src, pt, tc.wantParseTree)
+		}
+	}
+}