while!

tests/control_flow.rs

@@ -78,3 +78,45 @@ if string == "no" {
 }
 "#
 );
+
+run_test!(
+    while_single_loop,
+    r#"
+let x = true;
+while x {
+    x = false;
+    print "iter";
+}
+print "done";
+"#
+);
+
+run_test!(
+    while_count_to_100,
+    r#"
+let i = 0;
+
+while i < 100 {
+    print i;
+    i = i + 1;
+}
+
+print "done";
+    "#
+);
+
+run_test!(
+    while_run_never,
+    r#"
+let not_run = true;
+
+while false {
+    print "WRONG";
+    not_run = false;
+}
+
+if not_run {
+    print "good.";
+}
+"#
+);

tests/snapshots/control_flow__while_count_to_100.snap

@@ -0,0 +1,7 @@
+---
+source: tests/control_flow.rs
+assertion_line: 94
+expression: output
+
+---
+"0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n18\n19\n20\n21\n22\n23\n24\n25\n26\n27\n28\n29\n30\n31\n32\n33\n34\n35\n36\n37\n38\n39\n40\n41\n42\n43\n44\n45\n46\n47\n48\n49\n50\n51\n52\n53\n54\n55\n56\n57\n58\n59\n60\n61\n62\n63\n64\n65\n66\n67\n68\n69\n70\n71\n72\n73\n74\n75\n76\n77\n78\n79\n80\n81\n82\n83\n84\n85\n86\n87\n88\n89\n90\n91\n92\n93\n94\n95\n96\n97\n98\n99\ndone\n"

tests/snapshots/control_flow__while_run_never.snap

@@ -0,0 +1,7 @@
+---
+source: tests/control_flow.rs
+assertion_line: 108
+expression: output
+
+---
+"good.\n"

tests/snapshots/control_flow__while_single_loop.snap

@@ -0,0 +1,7 @@
+---
+source: tests/control_flow.rs
+assertion_line: 82
+expression: output
+
+---
+"iter\ndone\n"