Add SAHPoolUtil.getFileNames() method, and tests for it, per [forum:a3da1e34d8|forum feedback]. Add a test to demonstrate that two SAH pools can coexist so long as they have different names.

FossilOrigin-Name: 72dc3f8c3255186ec412412b685b0b51ddcd08240f2353ac742fc7da8c23568e

ext/wasm/api/sqlite3-vfs-opfs-sahpool.c-pp.js

@@ -501,6 +501,15 @@ globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     /* Current number of in-use files from pool. */
     getFileCount(){return this.#mapFilenameToSAH.size}
 
+    /* Returns an array of the names of all
+       currently-opened client-specified filenames. */
+    getFileNames(){
+      const rc = [];
+      const iter = this.#mapFilenameToSAH.keys();
+      for(const n of iter) rc.push(n);
+      return rc;
+    }
+
 //    #createFileObject(sah,clientName,opaqueName){
 //      const f = Object.assign(Object.create(null),{
 //        clientName, opaqueName
@@ -901,6 +910,7 @@ globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
     getCapacity(){ return this.#p.getCapacity(this.#p) }
 
     getFileCount(){ return this.#p.getFileCount() }
+    getFileNames(){ return this.#p.getFileNames() }
 
     async reserveMinimumCapacity(min){
       const c = this.#p.getCapacity();
@@ -1059,6 +1069,11 @@ globalThis.sqlite3ApiBootstrap.initializers.push(function(sqlite3){
      Returns the number of files from the pool currently allocated to
      slots. This is not the same as the files being "opened".
 
+     - array getFileNames()
+
+     Returns an array of the names of the files currently allocated to
+     slots. This list is the same length as getFileCount().
+
      - void importDb(name, byteArray)
 
      Imports the contents of an SQLite database, provided as a byte

ext/wasm/tester1.c-pp.js

@@ -3072,10 +3072,23 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
         db = new u2.OpfsSAHPoolDb(dbName);
         T.assert(1 === u1.getFileCount());
         db.close();
-        T.assert(1 === u1.getFileCount())
+        const fileNames = u1.getFileNames();
+        T.assert(1 === fileNames.length)
+          .assert(dbName === fileNames[0])
+          .assert(1 === u1.getFileCount())
           .assert(true === u1.unlink(dbName))
           .assert(false === u1.unlink(dbName))
-          .assert(0 === u1.getFileCount());
+          .assert(0 === u1.getFileCount())
+          .assert(0 === u1.getFileNames().length);
+
+        // Demonstrate that two SAH pools can coexist so long as
+        // they have different names.
+        const conf2 = JSON.parse(JSON.stringify(sahPoolConfig));
+        conf2.name += '-test2';
+        const POther = await inst(conf2);
+        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
@@ -3087,7 +3100,6 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
           .assert(!sqlite3.capi.sqlite3_vfs_find(sahPoolConfig.name));
 
         let cErr, u3;
-        const conf2 = JSON.parse(JSON.stringify(sahPoolConfig));
         conf2.$testThrowInInit = new Error("Testing throwing during init.");
         conf2.name = sahPoolConfig.name+'-err';
         const P3 = await inst(conf2).then(u=>u3 = u).catch((e)=>cErr=e);

manifest

@@ -1,5 +1,5 @@
-C Reformulate\s[907dfc4a7aa1]\susing\sawk\sinstead\sof\ssed\sfor\sbetter\scross-platform\sportability.
+C Add\sSAHPoolUtil.getFileNames()\smethod,\sand\stests\sfor\sit,\sper\s[forum:a3da1e34d8|forum\sfeedback].\sAdd\sa\stest\sto\sdemonstrate\sthat\stwo\sSAH\spools\scan\scoexist\sso\slong\sas\sthey\shave\sdifferent\snames.
-D 2023-07-26T07:57:55.835
+D 2023-07-26T11:11:39.057
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 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -502,7 +502,7 @@ F ext/wasm/api/sqlite3-api-worker1.js 9f32af64df1a031071912eea7a201557fe39b17386
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 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
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