add java_vendor()

Author: scivision

+stdlib/cpu_arch.m

@@ -5,3 +5,5 @@
 arch = javaSystemProperty("os.arch");
 
 end
+
+%!assert(!isempty(cpu_arch()))

+stdlib/java_vendor.m

@@ -0,0 +1,9 @@
+%% JAVA_VENDOR get vendor of Java Virtual Machine
+
+function v = java_vendor()
+
+v = javaSystemProperty("java.vendor");
+
+end
+
+%!assert(!isempty(java_vendor()))

+stdlib/os_version.m

@@ -10,3 +10,8 @@
 version = javaSystemProperty("os.version");
 
 end
+
+%!test
+%! [os, version] = os_version();
+%! assert(!isempty(os))
+%! assert(!isempty(version))

test/TestJava.m

@@ -37,6 +37,12 @@ function test_hostname(tc)
 tc.verifyGreaterThan(L, 0, "expected non-empty hostname")
 end
 
+function test_java_vendor(tc)
+v = stdlib.java_vendor();
+L = strlength(v);
+tc.verifyGreaterThan(L, 0, "expected non-empty vendor")
+end
+
 
 function test_java_version(tc)
 v = stdlib.java_version();
@@ -52,16 +58,18 @@ function test_java_api(tc)
 
 function test_cpu_arch(tc)
 arch = stdlib.cpu_arch();
-tc.verifyNotEmpty(arch)
+L = strlength(arch);
+tc.verifyGreaterThan(L, 0, "expected non-empty arch")
 end
 
 function test_os_version(tc)
 [os, ver] = stdlib.os_version();
-tc.verifyNotEmpty(os)
-tc.verifyNotEmpty(ver)
+Lo = strlength(os);
+Lv = strlength(ver);
+tc.verifyGreaterThan(Lo, 0, "expected non-empty os")
+tc.verifyGreaterThan(Lv, 0, "expected non-empty version")
 end
 
-
 function test_hard_link_count(tc)
 fn = mfilename("fullpath") + ".m";