wasm refactoring part 2 of (apparently) 2: moved ext/fiddle/... into ext/wasm and restructured the core API-related parts of the JS/WASM considerably.

FossilOrigin-Name: 27f9da4eaaff39d1d58e9ffef7ddccf1e41b3726914f754b920e3e1fb572cba6

ext/wasm/common/SqliteTestUtil.js

@@ -0,0 +1,173 @@
+/*
+  2022-05-22
+
+  The author disclaims copyright to this source code.  In place of a
+  legal notice, here is a blessing:
+
+  *   May you do good and not evil.
+  *   May you find forgiveness for yourself and forgive others.
+  *   May you share freely, never taking more than you give.
+
+  ***********************************************************************
+
+  This file contains bootstrapping code used by various test scripts
+  which live in this file's directory.
+*/
+'use strict';
+(function(self){
+  /* querySelectorAll() proxy */
+  const EAll = function(/*[element=document,] cssSelector*/){
+    return (arguments.length>1 ? arguments[0] : document)
+      .querySelectorAll(arguments[arguments.length-1]);
+  };
+  /* querySelector() proxy */
+  const E = function(/*[element=document,] cssSelector*/){
+    return (arguments.length>1 ? arguments[0] : document)
+      .querySelector(arguments[arguments.length-1]);
+  };
+
+  /**
+     Helpers for writing sqlite3-specific tests.
+  */
+  self.SqliteTestUtil = {
+    /** Running total of the number of tests run via
+        this API. */
+    counter: 0,
+    /**
+       If expr is a function, it is called and its result
+       is returned, coerced to a bool, else expr, coerced to
+       a bool, is returned.
+    */
+    toBool: function(expr){
+      return (expr instanceof Function) ? !!expr() : !!expr;
+    },
+    /** abort() if expr is false. If expr is a function, it
+        is called and its result is evaluated.
+    */
+    assert: function f(expr, msg){
+      if(!f._){
+        f._ = ('undefined'===typeof abort
+               ? (msg)=>{throw new Error(msg)}
+               : abort);
+      }
+      ++this.counter;
+      if(!this.toBool(expr)){
+        f._(msg || "Assertion failed.");
+      }
+      return this;
+    },
+    /** Identical to assert() but throws instead of calling
+        abort(). */
+    affirm: function(expr, msg){
+      ++this.counter;
+      if(!this.toBool(expr)) throw new Error(msg || "Affirmation failed.");
+      return this;
+    },
+    /** Calls f() and squelches any exception it throws. If it
+        does not throw, this function throws. */
+    mustThrow: function(f, msg){
+      ++this.counter;
+      let err;
+      try{ f(); } catch(e){err=e;}
+      if(!err) throw new Error(msg || "Expected exception.");
+      return this;
+    },
+    /**
+       Works like mustThrow() but expects filter to be a regex,
+       function, or string to match/filter the resulting exception
+       against. If f() does not throw, this test fails and an Error is
+       thrown. If filter is a regex, the test passes if
+       filter.test(error.message) passes. If it's a function, the test
+       passes if filter(error) returns truthy. If it's a string, the
+       test passes if the filter matches the exception message
+       precisely. In all other cases the test fails, throwing an
+       Error.
+
+       If it throws, msg is used as the error report unless it's falsy,
+       in which case a default is used.
+    */
+    mustThrowMatching: function(f, filter, msg){
+      ++this.counter;
+      let err;
+      try{ f(); } catch(e){err=e;}
+      if(!err) throw new Error(msg || "Expected exception.");
+      let pass = false;
+      if(filter instanceof RegExp) pass = filter.test(err.message);
+      else if(filter instanceof Function) pass = filter(err);
+      else if('string' === typeof filter) pass = (err.message === filter);
+      if(!pass){
+        throw new Error(msg || ("Filter rejected this exception: "+err.message));
+      }
+      return this;
+    },
+    /** Throws if expr is truthy or expr is a function and expr()
+        returns truthy. */
+    throwIf: function(expr, msg){
+      ++this.counter;
+      if(this.toBool(expr)) throw new Error(msg || "throwIf() failed");
+      return this;
+    },
+    /** Throws if expr is falsy or expr is a function and expr()
+        returns falsy. */
+    throwUnless: function(expr, msg){
+      ++this.counter;
+      if(!this.toBool(expr)) throw new Error(msg || "throwUnless() failed");
+      return this;
+    }
+  };
+
+  
+  /**
+     This is a module object for use with the emscripten-installed
+     sqlite3InitModule() factory function.
+  */
+  self.sqlite3TestModule = {
+    postRun: [
+      /* function(theModule){...} */
+    ],
+    //onRuntimeInitialized: function(){},
+    /* Proxy for C-side stdout output. */
+    print: function(){
+      console.log.apply(console, Array.prototype.slice.call(arguments));
+    },
+    /* Proxy for C-side stderr output. */
+    printErr: function(){
+      console.error.apply(console, Array.prototype.slice.call(arguments));
+    },
+    /**
+       Called by the module init bits to report loading
+       progress. It gets passed an empty argument when loading is
+       done (after onRuntimeInitialized() and any this.postRun
+       callbacks have been run).
+    */
+    setStatus: function f(text){
+      if(!f.last){
+        f.last = { text: '', step: 0 };
+        f.ui = {
+          status: E('#module-status'),
+          progress: E('#module-progress'),
+          spinner: E('#module-spinner')
+        };
+      }
+      if(text === f.last.text) return;
+      f.last.text = text;
+      if(f.ui.progress){
+        f.ui.progress.value = f.last.step;
+        f.ui.progress.max = f.last.step + 1;
+      }
+      ++f.last.step;
+      if(text) {
+        f.ui.status.classList.remove('hidden');
+        f.ui.status.innerText = text;
+      }else{
+        if(f.ui.progress){
+          f.ui.progress.remove();
+          f.ui.spinner.remove();
+          delete f.ui.progress;
+          delete f.ui.spinner;
+        }
+        f.ui.status.classList.add('hidden');
+      }
+    }
+  };
+})(self/*window or worker*/);