inital vesion of recast working

src/lang/recast.test.ts

@@ -1,8 +1,7 @@
 import { recast } from './recast'
-import { Program } from './abstractSyntaxTree'
-import { abstractSyntaxTree } from './abstractSyntaxTree'
-import { lexer } from './tokeniser'
-import { Token } from './tokeniser'
+import { Program, abstractSyntaxTree } from './abstractSyntaxTree'
+import { lexer, Token } from './tokeniser'
+import fs from 'node:fs'
 
 describe('recast', () => {
   it('recasts a simple program', () => {
@@ -26,6 +25,56 @@ describe('recast', () => {
     const { ast: ast2 } = code2ast(codeWithOtherQuotes)
     expect(recast(ast2)).toBe(codeWithOtherQuotes)
   })
+  it('test assigning two variables, the second summing with the first', () => {
+    const code = `const myVar = 5
+const newVar = myVar + 1`
+    const { ast } = code2ast(code)
+    const recasted = recast(ast)
+    expect(recasted).toBe(code)
+  })
+  it('test assigning a var by cont concatenating two strings string', () => {
+    const code = fs.readFileSync(
+      './src/lang/testExamples/variableDeclaration.cado',
+      'utf-8'
+    )
+    const { ast } = code2ast(code)
+    const recasted = recast(ast)
+    expect(recasted).toBe(code.trim())
+  })
+  it('test with function call', () => {
+    const code = `
+const myVar = "hello"
+log(5, myVar)`
+    const { ast } = code2ast(code)
+    const recasted = recast(ast)
+    expect(recasted).toBe(code.trim())
+  })
+  it('function declaration with call', () => {
+    const code =
+      [
+        'fn funcN = (a, b) => {',
+        '  return a + b',
+        '}',
+        'const theVar = 60',
+        'const magicNum = funcN(9, theVar)',
+      ].join('\n')
+    const { ast } = code2ast(code)
+    const recasted = recast(ast)
+    expect(recasted).toBe(code.trim())
+  })
+  it('sketch declaration', () => {
+    let code = `sketch mySketch {
+  path myPath = lineTo(0, 1)
+  lineTo(1, 1)
+  path rightPath = lineTo(1, 0)
+  close()
+}
+show(mySketch)
+`
+    const { ast } = code2ast(code)
+    const recasted = recast(ast)
+    expect(recasted).toBe(code.trim())
+  })
 })
 
 // helpers