Add tests for SAHPoolUtil.exportFile() and importDb().

FossilOrigin-Name: 4aa88b8fb1c99137ed7531e5c82a241738a2b0554f7af82c0ed0ce8d16a0879a

ext/wasm/tester1.c-pp.js

@@ -353,7 +353,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
   const sahPoolConfig = {
     name: 'opfs-sahpool-tester1',
     clearOnInit: true,
-    initialCapacity: 3
+    initialCapacity: 6
   };
   ////////////////////////////////////////////////////////////////////////
   // End of infrastructure setup. Now define the tests...
@@ -3076,7 +3076,24 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
         T.assert(1 === fileNames.length)
           .assert(dbName === fileNames[0])
           .assert(1 === u1.getFileCount())
-          .assert(true === u1.unlink(dbName))
+
+        if(1){ // test exportFile() and importDb()
+          const dbytes = u1.exportFile(dbName);
+          T.assert(dbytes.length >= 4096);
+          const dbName2 = '/exported.db';
+          u1.importDb(dbName2, dbytes);
+          T.assert( 2 == u1.getFileCount() );
+          let db2 = new u1.OpfsSAHPoolDb(dbName2);
+          T.assert(db2 instanceof sqlite3.oo1.DB)
+            .assert(3 === db2.selectValue('select count(*) from t'));
+          db2.close();
+          T.assert(true === u1.unlink(dbName2))
+            .assert(false === u1.unlink(dbName2))
+            .assert(1 === u1.getFileCount())
+            .assert(1 === u1.getFileNames().length);
+        }
+
+        T.assert(true === u1.unlink(dbName))
           .assert(false === u1.unlink(dbName))
           .assert(0 === u1.getFileCount())
           .assert(0 === u1.getFileNames().length);
@@ -3089,6 +3106,7 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
         log("Installed second SAH instance as",conf2.name);
         T.assert(0 === POther.getFileCount())
           .assert(true === await POther.removeVfs());
+
         if(0){
            /* Enable this block to inspect vfs's contents via the dev
               console or OPFS Explorer browser extension.  The

manifest

@@ -1,5 +1,5 @@
-C Do\snot\stry\sto\sadd\sMEM_Term\sto\san\sMEM_Static\sstring\seither.
-D 2023-07-29T22:58:47.914
+C Add\stests\sfor\sSAHPoolUtil.exportFile()\sand\simportDb().
+D 2023-07-30T03:54:10.966
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 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
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+4aa88b8fb1c99137ed7531e5c82a241738a2b0554f7af82c0ed0ce8d16a0879a